Aerating device



July 15, 1952 F. MALZACHER 2,603,465

AERAT ING DEVI CE Filed Feb. 17, 1950 l 2 SHEETS-SHEET 1 IN VEN TOR.

@ed /laZzar/wr /I/TORNEY July 15, 1952 F. MALZACHER 2,603,465

AERATING DEVICE Filed Feb. 17, 1950 2 SHEETS-SHEET 2 *i* ww 46 4g O O (D w v 24d /45 50 43' INVENTOR.

Patented July 15, 1952 UNI-.TED 'i STATES PATENT oFEIcE I I" A. "f 2,603,465 y 1 j 'AERATING DEVICE p j redMalzacher, Elmhurst, N.y Y. Application February 17, 1950, Serial No. 144,753

The present invention relates generally to aerating devices and more particularly to a new and improved device adapted` to supply fluids such asgases or'liquids to a substance which is being mixed or beaten in a'b'owl; Y, .It vis recognized by those skilled Vin the culinary art thatfthe introduction offair into .substances suchV as cake mixtures, egg-whites, batters 1and the like whilel they are being mixed imparts. to the resulting .cake,. biscuitsor pastry, superior qualities of lightness, fluifmessf andA delicacy.

Considerable diiiiculty has been encountered, however, in providing a satisfactory .aerating device which could be employed vs'ucc'essfullyiwith mixing bowls of the typesr commonlyf'used by housewives, bakeries, and the like.

Most prior aerating devices have provenr unsatisfactory in several respects.- A major defect has-been theirV failure to supply airlevenly to the material being mixed or agitated. Lack of uniform supply results in the aeration of only a part of the substance being mixed. Another disadvantage of past devices has been4 their com-4 plicated designs; structure'svembodying numerous delicate parts madethem'unduly expensive to manufacture and subject to objectionable maintenance difficulties. A tendency for an air inlet passage to become vclogged by the material presented still another objection to aerating devices produced heretofore. Y

The present invention aims to overcome or 1 9 lClaims. (Cl. 26h-14) minimize the above and other difficulties by pronew and and improved device may be readily as-v sembled and disassembled without requiring any special skill on the part of a user. y An object of the 'present invention is to provide anew and improved aerating device adapted.

for use with mixing bowls 'and the like.

'Another object of the invention is to provide an aerating device adapted'to distribute air uniformly to the interior of a bowl or container.

Another object of the invention is to provide a fluid supplying device that is relatively simple in construction and operation, yet sturdy and inexpensive to manufacture.

Still another object of theinvention is to provide an aerating device that may heat the uid prior to its entry into a container.

Another object of the present invention Vis to provide. an air supplying' device that will not readily become clogged by thesubstance being treated. y l

*Other and further 'objects' of the invention will be obviousjuponjan understanding of the illustrativey embodiment about to be described, or will be" indicated in the 'appendedclaims and various advantages not referedto hereinrpwill Y 2 occur to onelskilledin the art upon employment of the invention in practice.` Y f A preferred embodiment of the invention has been chosen forfpurpose's of illustration and description and is shown in the accompanying drawings, forming a part of the specication,

Fig. 1 is a sectional view of thepresent device as it may be used with a mixing bowl;

Fig. 2 isa view along line 2-2 of Fig..1;

Fig. 3 is an enlarged fragmentary sectional view of a portion of the device illustrated in Fig. 1, showing sealing'contacts between a seating member and a base member; and u Fig. 4 is a sectional view of a device similar to that of Fig. 1 but which includes a fluid Vheating means.

While the present device is useful for supplying fluids to various substances, rand may be used with any appropriate container, for purposes of convenience it will be illustrated and described chiefly in connection with a mixing bowl and for supplying air to a dough therein.

Referring to Fig. 1, there is shown a mixing bowl I adapted to contain a supply of dough to be aerated. The bowl I 'has an aperture 3 in its lower portion facilitating detachable mounting upon a seating member f4. The latter member 4 v may be detachably mounted on a base member 5. Members 4 and 5 cooperate .to vform an air chamber 6 and are. preferably formedofmetal castings or forgings,'but'they maybe made of'wood, plasticlor other suitable'mate1"ial.`A i

Seating member# isshown with an upper bowlseating surface' 1 corresponding generally with the concavity or angulationof the underside 8 of the 'bowl tov be supported, a side portion 9, a low'ei'jvfaceflhaving an annularbase-seating recess or groove Ilextending therearound, and a central portion Il4 with a recess I3. 'An upper wall portion of the centralportion I2 is preferably vtapered v'so asto -provide an inverted frus- 15o-columnar I4 for an airentrouing valve 2s; the lower wall of the central p ortionl2` may be substantially vertical. vExi'feriding through the wall of center/portionyIZ 'are shown a plurality of vports or airinletapertures It; In the illustrate'dembodiment, ports! 6 are obliquely extendmg ,The base lmember 5vr which cooperates with the seating'member @to `form thejairr chamber 6 has an .outer wall. portion 1 I5 "preferably annular Vin outer contour and a'center portion lI 1 having an Y opening jIIl`therethroughf.A The upper edge I9`of form airtight seals at `zones 2.0.- and -2 l, each-of outer! wall portion '.ljliits yintorecess I I -of-.the seating member4, in aisort of tongue and groove relation toform an fairltightfseal between'l the.

seating member 4 and .thebase' member Referreiffenfibodiment the groove I I'and the tongue surface areas; Rather theymake contact.. and

the recess on the base member and the 'pibj'ec tion depending from the seating member 4'.

Air may be supplied to the chamber 6 froma hose 22 shown connected with an inlet opening 23 of a conduit 24 formed with and projecting from the base member 5. Anysuitable means 25 may be used to detachably secure the hose in posimon. e

Airpasses fromthe chamber 6 throughthe-*inglet aperture I6, past the valve 26,V and into a chamber 21 between the bowl wall and an-vai-r distributing plate member 28. The plate 28 Vis shown provided with anV opening in its center Vportion and mountedon van endA portion 29 of a bolt 30 which serves to hold the plate 28 firmly against a wall of the bowl. The embodiment of Fig. -1 shows the'plate' 28 as generallyV convex or dome-shaped tol cooperate" with the bowl wall in forming the chamber 217i; the plate 28 and bowl wallsy mayof course, have-any suitable Vconfigurations.Y f 1 From the chamber 21, beneath the plate- 23, air

passes througha plurality ofV circumferentially i spaced, generally radially extending slits or openings'SI in the plate 28'. Outer edges of the plate 28 intermediate the openings 3| are pulled firmly against the bowl -wall by bolt 30 and itsv handfwheel or nut 32 and' hence air normally emerges from the chamber 21 onlyfthrough` the openings 3I. The openings 3I` distribute thev air evenly to the. substance being mixed or whipped in the bowl. I

When the handle 32 is tightened to bear against the grooved seat 33A of the base member 5 the constituent members of. the aerating de'- vice then are positioned .inoperative relation one to the other. YThe seating member. 4 makes seal- 'ing contact with the baseH member 51 atl ,annular zones 2U and 2I and outer portions of the plate 28are pulled against Vthe bottom4 of the bowl I. To disassemble the device'the handle` 32 may l Y be turned so asto disengage it from the threaded portion of bolt 30.. The bowl I and seating .mem-v ber 4, whichr normally remains assembledV therewith, may then berliftedgfrom` the basemember 5. The plate member 28 with bolt 30 may then be lifted out of the aperture in thebowl-walland seating member. The valve member 26 may be .slid offl the bolt at this time. Toassemble, the

above process isreversed. l

Slidably mounted on the y e K e providedV anF air valve, 26 of-rgenerallyA inverted Y frustro-conicalshape. A`As illust'rated inl Fig'. l',

in a normally yclosed position the Vvalve makes sealing contact with )complementary walls of the valve seat2I4, Vclosing the air inlet passages I6. When air'o'f'a suitable pressure is'A introduced .through thelinlet passages I6 and presses V,against the sides of the valve, 26,'js`aid'valve tends to 'raise on'the bolt member 30 tothe position indicated in dotted outline, admittingair to the cham'- ber 21. The bolt 30 thus serves as a guide for V'the air controlling valve 26Y so that it mayV seat and unseatl vcorrectly at' all times. When the 'air be connected to a source of air pressure by a flexible hose'22 yor other` Ysuitzjtble y connection.

When 4the air is'turned rrit passes through the conduit to the large chamber 6 and enters the air inlet passages I6. The pressure of the air against its inclined walls raises the valve 26, perwhipped in the bowl may be aerated uniformly and completely byV a plurality: of air'streams: injected intoit from below.A e Y In some instances it" may bei desired to heat -the air prior to delivery.' of. it to' a mixing bowl and in Fig. 4 there .is illustrated'meansfor achievingv this. The structure therel shownv embodies; an upper portion vgenerallysimilar to that of. Figs. 1-3; airpasses into the bowl I through the chamber 21 beneath the plate 28, the valve 26 prevent ing any backflow of material through the ports I6 of the member 4 into the air chamber 6a:

' In the form shown in Fig. llst-hel shaft 36a` which guidesthe valve 26 is similar t'o that of Fig. but is longer and extends through an extension 40 of the central shaft supporting7 portion. A hand wheel 32a serves to pull firmly together against each other the upper seating. member 4 and the base or lower member42. The wall portions 43 of the basev member 42 extend a greater distance downwardly below the horizontal wall 44 thanin the form shown in Fig. l, and forman air heating compartment 46, which isnclosed at its underside by a plate 48. The plate 48 may be inserted into its seat and then turnedso as to rest against. lugs 50, being thereafter securedV by screws 52.

Air entering the heater a compartment 46 through the base connection v2da. passes overan electric heater 49, which may be connected through a wall of the base member with an exterior plug connection 5I. rI he heater may be maintained at any suitable temperature. Heated air flowsV through an opening 53 into the exterior air chamber 6a and fromvtherev into the bowl I in a manner similar to that described in connection` with Figs.; 1-3. e While the heatercould be placed directly withinrthe chamber 6 of Fig. l-, the construction of Fig. Llis preferred asthere may thusbe provided asomewhat larger compartment, and manufacturing and *maintenance problems aresimplijijled. Y

It willbe seen thatrthepres'ent invention is an aerating device of a ruggedyt simple construction which permits easy assembly andidisassembly. The device provides for complete aeration of the substance Vor liquid the bowl, by either Y Y Y theinvention and withoutsalcng any of its supply is cut oigravity causes thevalve to lower; .3.

along theguide bolt s jand close the inlet'j ports 4I6 against leakage fofV the' contentsV of'tlle' bowl therein.

'In operation, the lateral inletconlduitw24 may advantages, it is to be understood .that all'mat't'er herein is to be interpreted "as 'illustrati'vandfnot in a limiting sense. Y

Havingthus deseribemmyinvention, I l l. In a device adaptedftolbeutilized for supplying 4t() amixing leciti/lftheeliminationA of anV Y' inner memberhavingacavity" therein for form- @with an ingenerare ofss'aid bowl an air chamberV disposed interiorly ofthe bowl, a rodlike member extending from said first-mentioned member adapted to project through an opening in a said bowl, a valve member guided by and movable along said rod-like member, outer means extending about said rod-like member adapted to be positioned against an outer surface of a said bowl including an enclosed air receiving chamber and having a port therethrough adapted to be opened and closed by said valve member.

2. In a device adapted to be utilized for supplying air to a mixing bowl, the combination of an inner member having a cavity therein for forming with an inner wall of said bowl an air chamber disposed interiorly of the bowl, a rod-like guiding and connecting member extending from a central portion of said first-mentioned member adapted to project through an opening in a said bowl, a valve member guided by and movable along said rod-like member, a plurality of additional members adapted to be positioned exteriorly of a said bowl with one member resting against an outer wall of the bowl and together forming an air receiving chamber, one of said members having a port through a portion thereof adjacent said rod-like member adapted to be opened and closed by said valve member, and means for releasably retaining together said inner member and said plurality of additional members. y

3. In a device adapted to be utilized for supplying air to a mixing bowl, the combination of a member having a cavity at the underside thereof for forming with an inner wall of said bowl an air chamber, a guiding and connecting member projecting from a central portion of said first-mentioned member adapted to extend through an opening in a said bowl, a valve member guided by and movable along said guiding and connecting member, a seating member extending around said guiding and connecting member adapted to rest against an outer wall of said bowl having a port through a portion thereof adjacent said guiding and connecting member adapted to be opened and closedby said valve member, a base member supported against said seating member and forming therewith an air receiving chamber, said base member and seating member resting against each other along a plurality of spaced annular areas for minimizing escape of air out of said chamber.

4. In a device adapted to be utilized for supplying air to a mixing bowl, the combination of a iirst member adapted to rest against and form with an inner wall a said bowl an air chamber, a rod-like guiding and connecting member secured adjacent one end thereof to and projecting from said first-mentioned member adapted to extend through an opening in a said bowl, a valve member guided by and movable along said rod-like member, a seating member extending about said rod-like member adapted to be positioned exteriorly of a said bowl and having a port through a portion thereof adjacent the rod-like member adapted to be opened and closed by said valve member, a base member extending about said rod-like member and in contact with said seating member forming therewith an air receiving chamber, and means for engaging the opposite end of said rod-like member and drawing said first member against said inner wall of the bowl and said seatingv and base members toward each other.

5. In a device of the class described, Afor supplyto and fro along said rod, means resting against an outer Wall of the bowl adapted to form an air chamber at the exterior of said bowl and having a port adjacent said rod adapted to be closed by said valve and an inlet for admittingl air to said exterior chamber, and a heater carried by said means and exposed to air delivered through said inlet to said exterior chamber.

6. In a device of the class described for supplying heated air to a mixing bowl, an inner member having a cavity therein and adapted to be positioned within a mixing bowl to form therewith an air chamber at the interior of said bowl, a rod projecting from said member adapted to extend through an opening in the bowl, a valve movable along said rod, a plurality of members extending about said rod adapted to cooperate with each other in forming an air chamber at the exterior of said bowl, One of said plurality of members having a surface conforming generally to an outer surface of the bowl for resting against the bowl and having an air outlet port adjacent said rod adapted to be closed by said valve and the other member having an air inlet port, a heater carried by one of said plurality of I members below said exterior air chamber for heating air passing through the inlet port, and a plate forming With the heater carrying member an air heating compartment.

7. A device as claimed in claim 4, in which said base member has a recess therein, said opposite end of the rod-like member projects into the recess, land the means for engaging said opposite end is normally disposed in said recess. l

8. A device as claimed in claim 1, in which 'said MALZACHER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 213,309 Wilcox Mar. 18, 1879 237,150 Williams Feb. 1, 1882 785,622 Longuemare et al. Mar. 21, 1905 1,939,583 Welshausen Dec. 12, 1933 1,964,345 Feller June 26 1934 2,072,691 stark Mar. 2:1937 2,074,597 Stark Mar. 23 1937 2,076,979 christiensen Apr. 13: 1937 2,345,081 Ward Mar. 28, 1944y 2,371,431 Di Pietro Mar. 13, 1945 FOREIGN PATENTS Number Country Date 475,242 Great Britain Nov. 16, 1937 777,175 France Nov. 26, 1934 

